Part 55

Lake Cleveland, the most northern and deepest of the group, was connected in position with the river St. John at a point 2 miles below the upper chapel of the Madawaska settlement, by a chained and coursed line following the portage represented on the map 5-1/6 miles long.

The Alleguash was ascended in the month of October in bateaux and canoes from its mouth to its source in Lake Telos, a distance of about 94 miles. The river and its lakes were coursed by a compass, the distances estimated, and the projection resulting therefrom corrected before being placed upon the map by means of astronomical observations at eight intermediate points between its mouth and its source. The lakes were triangulated by means of magnetic bearings as far as was practicable, in order to obtain their widths and general contour. In the vicinity of Chamberlain Lake use has also been made of a recent survey of Mr. Parrott, a surveyor in the employ of the State of Maine, to whom we acknowledge ourselves indebted for the aid which this portion of his valuable labors furnished us.

Between the head of Lake Telos and Webster Pond, one of the sources of the East Branch of the Penobscot, there is a portage of only 1 mile and a half. This, together with a small cut or canal, made in 1841 to connect the waters of Lake Telos with those of Webster Pond, enabled the party which made this survey to proceed with their boats and baggage down the Penobscot to Bangor, where they and their surplus stores were disposed of.

A survey of the river St. John was made in the month of September with the chain and compass from the mouth of Fish River to the intersection of the meridian of the monument at the source of the St. Croix with the St. John. This survey was afterwards extended eastward to the Grand Falls, in order to connect with the astronomical station established there, and westward to the mouth of the Alleguash, embracing a distance of 87 miles. The islands were all surveyed, and the channels on either side of them sounded.

The commissioner, having had other duties assigned him in reference to the question of boundary, did not take the field in person until September. Between the middle of that month and the middle of December he was occupied in performing the field duties assigned him by the Department of State.

The party conducted by him in person made the astronomical observations for the determination of the latitude and longitude of the Grand Falls of the St. John, and of the mouths of the Grand, Green, Madawaska, Fish, and St. Francis rivers, all tributary to the St. John.

The same party also made a survey of the river St. Francis from its mouth to the outlet of Lake St. Francis, a distance of 81 miles.

This river was coursed by means of a compass, and whenever the nature of the shores would permit the distances from bend to bend were either measured with a chain or paced. Through the greater part of the stream, however, the impediments offered by the thick and small growth near the shores rendered this degree of minuteness impracticable and a resort to estimating the distances by the eye, well practiced by previous actual measurements, became necessary.

Before putting the trace of the river thus derived upon the map it was adjusted to correspond with the results of astronomical observations for latitude and longitude at twelve intermediate points between its mouth and the outlet of Lake St. Francis. Its three principal lakes, viz, Pettiquaggamas, Petteiquaggamak, and Pohenagamook, were triangulated and sounded as exhibited by the maps of detail yet to be handed in of the operations of this division.

A profile of the river, exhibiting the slope of the country through which it flows, was obtained by barometric observations made at fifteen points between its mouth and the bridge where it is intersected by the Grand portage road.

A connection was made with Long Lake, a tributary to Lake Temiscouata, by a chained line from a point on the St. Francis 2 miles below the mouth of Blue River to the western shore of Long Lake, by which it was ascertained that the shore of this lake approached within 2-3/4 miles of the river St. Francis.

The outlet of Lake Pohenagamook was reached in a distance of 49-3/4 miles from the mouth of the St. Francis following the sinuosities of the river on the 18th of October.

A camp was established on the southwest shore of the lake at its outlet for the purpose of making the necessary astronomical observations to determine the latitude and longitude of this position. Ten days were spent here for this object, out of which we had only three nights that were favorable for observation. These were improved as far as possible, and the results obtained, combined with those obtained by Captain Talcott's parties on the Northwest and Southwest branches of the St. John, have furnished the elements for laying down upon the general map the straight lines which show the boundary as it is required to run between the highlands and the river St. John under the treaty of 1842. These furnish data for an accurate exhibition of the extent of territory included by this portion of the boundary as fixed by that treaty.

The south shore of Lake Pohenagamook forms an angle of about 100° with the direction of the stream which flows from it, and marks with great certainty the point at which, according to the late treaty, the straight line is to be commenced in running the boundary southwestward to the Northwest Branch of the river St. John.

The work of this division was connected with that of Captain Talcott's division of the preceding year by noting the position of a common point on the western shore of Lake Pohenagamook near its head.

The commissioner and his party reached the Grand portage, or British military road, where it crosses the river St. Francis on the 2d of November, and connected their work with that of Professor Renwick's division of the preceding year at the bridge near Fournier's house.

Observations were also made at this bridge for the latitude and longitude, when the weather was favorable, between the nights of the 2d and 5th of November, and a connection was made in longitude with the meridian of Quebec by comparisons of the local time with three chronometers transported from the first to the last mentioned place between the 6th and 10th of November.

This comparison was repeated on the return of the commissioner by observing again at the St. Francis bridge before mentioned on the night of the 10th of December, with the thermometer ranging during these observations from 11 to 15° below zero of Fahrenheit's scale, there being then near 4 feet of snow upon the ground. The commissioner then proceeded by the Grand portage road, and the road which pursues the margin of Temiscouata Lake and the valleys of the Madawaska and St. John rivers, to the mouth of Green River, where on the night of the 12th of December he again observed at the same point where his observations of the 29th of September were made while ascending the St. John. These completed, he proceeded to the Grand Falls, and on the 14th of December discharged his party, which terminated his field duties for the season.

The distance surveyed along the new line of boundary by this division the past season is--

Miles. 1. Along the river St. John from the meridian of the monument of the source of the St. Croix to the mouth of the river St. Francis 71-1/2

2. Along the river St. Francis from its mouth to the outlet of Lake Pohenagamook 49-3/4

Total 121-1/4

IV.

A map marked L², on a scale of 1:400,000, exhibiting the lines respectively claimed by the two nations under the treaty of 1783, as well as that adopted by the treaty of 1842, is herewith presented. By reference thereto the operations of the several divisions during the present and previous years will be better understood.

For a more particular view of the surveys and explorations made under the direction of each of the commissioners, including descriptions of the face of the country, navigation of streams, etc., the undersigned respectfully refer to their respective narratives hereto appended, and to the maps of detail deposited by each in the Department of State.

All which is respectfully submitted.

JAS. RENWICK, A. TALCOTT, JAMES D. GRAHAM, Commissioners.

APPENDIX No. 1.